Engine mounting



DC. 10, 1929. A, sI HARBOUR ENGINE MOUNTING -friled Nov. 25, 192e @www Patented Dec. 10, 19x29.

` tion.

a resilient mounting that will serve, in a I sense, to insulate the engine and frame from each other in a manner that shocks and vibrations are effectively cushioned, and their transmission from one to the other prevented, whereby the incidental strains and harmful effects are eliminated and the occupants ofthe motor car are relieved from`disagreeable sensations.

In an eight cylinder v90" V-type engine, which is one having two banks or rows of with the axis ofthe cylinders positioned at right angles to each other, wherein the pistons act through the usual connecting rods on an unbalanced `crank shaft having its cranks in a single plane, theunbalanced forces active during engine operation, setup a resultant lateral vibration of the engine as a `whole. While such inherent vibration is of small amplitude, amounting to buta few that varies in accordance with engine speed and in theevent lthe engine and frame are rigidly connected, the constantlyl occuring vibratory reactions sent throughout the entire stresses on others, and all the while are high- 1y disagreeable to the nervous systems of the driver and his passengers. The unbalanced operating forces, torque reactions, and lthe like, tend to swing or loscillate this type of engine about an imaginary axis that extends longitudinally of the engine and centrally thereof, from above the front of the engine, diagonally downward toward the rear, where 1t intersects the axis of the crank shaft somewhere .beyond the engine, near the: transmission gearing or vthe universal joint, as theseparts are `arranged'in a 'conventional manner. l

It is an object of the invention to providev four cylinders each, arranged side by .side

thousands of an inch, it is of high frequency vehicle chassis, cause rattle and noise in some. 'f l parts, and place'. damaging strams and.

Itis with enginesfof this typethat the liure!) A's'rixrssl PATENT 7orricia:

ALBERT STANLEY HARBO'OR, 0F PONTIAC, MICHIGAN, ASSIGNOR TO GENERAL lIOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION 0F DELAWARE ENGINE MOUNTING present vinvention is especially conceined and to lmeet .the conditions presented, the inventipn contemplates the formation of cooperatmovement, as might tend to occur, because of road shocks, momentum, or other extraneous forces the cooperating surfaces are preferably corrugated or undulated in a longitudinal direction, to present offset or co-acting ribs and depressions extending transversely of the vehicle or in the direction of the inherent oscillations. The engine is, therefore, cushioned against shock, and stably supported in the frame and held against movements of major proportions, while engine vibra Y tions of small amplitude are ei'ectually damped out and prevented from being transmitted through the chassis frame and associated parts.

The invention will. be more fully 'under-l I stood upon reference to the accompanying drawing illustrating a preferred embodiment, and wherein Figure 1 is a front elevaf tion, partly in section, of an engine supported in a chassis frame according to Vthe present invention; Figure 2- is a longitudinal sec tional view of one -of the points of connec-- tion between the engine and framegFigure 3 is a top plan view of a supporting bracket secured to the chassis frame; Figure 4 is a detail sectionalview ofthe mounting for the rear of the engine, and Figure 5- isa side elevation of the engine mounted in the frame. Referring to the drawing the engine l is of the eight cylinder V-type and issupported on a4 chassis frame having a pair of longitudinally extending channel s ha ed side members 2 and 3. Secured to, and ormingl a part-of the engine or power plan-t. unit, is a suitable clutch enclosed within a housing 4, and change speed gearing or transmission mechanism encased within the housing 5, through which the rotation of the engine crankshaft is transmitted to the' propeller or drive shaft 6, connected with the transmission shafting through a universal joint 7. A gear shift lever 8. extending upwardly beside the drivers seat controls the change speed mechanism' and a foot operated pedal 9 controls the clutch, it being pivoted on a fixed shaft 10 at its lower end and having anv arm 11 connected by a rod'or link 12 with the clutch operatin lever 13.

cent the universal 'oint 7 and-projecting diagonally upward a ove the top of the engine at the front end. The engine tends to swing or oscillate about this imaginary line X-X, throwing the front of the en ine to and fro `throughout a small amplitu e or range of movement.

It is prdposed to support the rear of the' engine at a single central point .closely adjacent thel neutral axis or at a point. where Athe vibration is practically limperceptible and i not so pronounced. To this end abracket 16 is bolted or otherwise secured to the rear of the transmission housing 5 and is provided wlth a concave or socketed recess on its under surface in which is positioned a partispherical cup f7 having-therein a concavoconvex ad 18 of rubber or other similar elastic eformable material, that rests upon the upper convex surface of a bracket 19, secured as by rivets to the transverse frame memberw20. Af connecting bolt or stud 21 threaded into the bracket 19 projects .thru the pad 18 and bracketpl, and`has a nut 22 threaded on its upper end, to hold the parts m assembled relations rear support thus described sort" of univeraevlall joint, the relativefmovenent being permitted by the deformation of the rubber pad which also cushions shocks and insulates the frame and en e from each other.

additionto the single point of suspen sion at the rear, the engine is also supported at two ints at its front end whereby there is aor ed a three point'suspension arrangement which is'found to be highly eifective in relieving the engine from the racking strains incident frame weaving, as occurs when the vehicle is negotiating rough roads.

.The two front supports are located. one on each side of the en ine and are identical, each comprising a U-s a ed bracket 25, prefer- Iably stamped from s eet metal and bolted to engine 1, and a second bracket 26 also of U-shape and stamped from sheet metal that is riveted to the chassis frame, with a pad or body 27 of rubber or the like, interposed between the adjacent surfaces of the bases or connecting portions 28 and 29 of the brackets and 26 respectively. The mating surfaces of the brackets are arcuate in shape and form arcs of circles Whose centers are on the axis X-X about which the engine oscillates. A

fastening bolt 30 positioned on the radial line XY, extends through openings in the parts 28-and 29 and carries a retainer disc or plate 31 for a sleeve or bushing 32 of rubber, or the like, which surrounds the bolt and extends through the opening in the meinber 29, seating against the annular flange 33 at the opening to cushion lateral movement of the fastening bolt 30. A ring 34 is interposed between the lower edge of thel flange 33 and an annular iange formed at the lower end Aof the elastic sleeve. Atits upper end the fastening bolt 30 carries a pair of lock nuts 35 holding in place a retaining cup 36 for the coil spring 37, interposed between the cup 36 and base 38 of the bracket 35. The spring is preferably placed under slight compression and its-tenslon yieldingly holds the parts in assembled relation. f

The mating faces of the brackets 25 and 26 beine' formed on arcs 4about the center ofloscillation greatly facilitate the deformation of the rubber in permitting and cushioning the inherent lateral vibration of the engine. To restrict relative longitudinal movement, the mating faces are preferably, corrugated longitudinall or formed with co-acting transverse ri s and depressions, which offer resistance to the deformation of the elastic pad 27 in directions other than directlon o f the movement caused by inherent engine v1- brations. Theengine is stably supported in the frame While the high frequency vibrations of small amplitude are damped out.

In lsome instances, it may be found desirable, for the purpose of further stabilization of the engine in theframe, to employ a brac ing element which automatically varles in length in synchronism with vibratory movements. This bracing element mayl consist of a rod 40, rigidly 4connected with the chassis frame and having an enlarged head41 at one end located withln a chambered part ofthe engine block and between which head and a cover plate 42 at the side of the chamber, is interposed a coil-spring 43. The head 41 bears against a lever or cam follower 4'4 pivoted at 45, and whose'nose bears against a four- 'lobed cam 46 on the cam shaft 47. Rotau tion of the cam 46 rocks the f( lower lever 44 to vary the effective length of the brace, dependent upon the vibratory reactions of the engine. Since the vibrations occur twice for each rotation of the crank shaft, and the crank haft rotates twice for each rotation vary the length ofthe brace in direct relation with engine vibration. This synchrosol nizedbracing arrangement is fully described and claimed in the pending application S. N. j 314,203, filedby Caleb E. Summers.

I claim: i g

-1. Means forI resiliently mounting an engine, or the like, that has an inherent lateral Vibration set up bv the. unbalance of its moving parts and oscillating about a neutral axis v extending longitudinally of theengine, including in combination with suclr an engine,l of a support on which the engine rests, and a pad of cushioning material interposed'betweenV adjacent faces of the, engine andsupport, such adjacent faces being arcuate in shape, andthe center of the'arcs being substantially on` said neutral axis of oscillation.

2. Means for iesilientl-y mounting an. engine, orthe like, that has.' an inherent lateral vibration setup by the unbalance of its moving parts and oscillating about a neutral axis extending longitudinally of the engine, in-

jcluding in combination with such an engine,

of a support on which the engine rests, and'V elastic deformable materialj interposed be-` tween adjacent arcuate faceson tlie/ engine and support and permitting relative movement between the engine 'and support, the

arcsl of said faces having their centerssub-y stantially on said axis of oscillation.

oscillation, and elastic-deformable naterial 3. Means for resiliently mounting an engine, or the like, that has ai inherent lateral vibration set up by the unbalanceof its mov.- ing parts and oscillating about a neutral axis extending longitudinally of the engine, including in combination with such an engine, of a support on which the engine rests, the adjacent surfaces of the engine and'support mating with eachother and extending-along an arc of a. circle whose center is on the axis of interposed between said surfaces, and being deformable to accommodatev the inherent en-v gine vibration.l 4 4. In combination with a support and a body tobe supported having inherent lateral vibration and oscillating about a longitudinally extending axis, of a connection between the support and body including mating surfaces shaped to form arcs of circles whose centers are located substantially on the axis 5. The structure of claim 4 wherein the arcuate surfaces are undulated in a direction' extending transversely of the arcs.

6.*In combination with a support vand a Y body to be supported having inherent lateral vibration a d oscillating about a longitudi-- nally exten ing axis, of a connectionbetween the support and body' including mating surfaces shaped to 'forni arcs of circles whose centersare located vsubstantially on the axis of oscillation, and elastic deformable material body lto be supported having inherent lateral vibration and oscillating about a longitudinally extending axis, of a connnection be-v tween the support'and body including mating surfacesshaped to form arcs Iof circles whose centers are located substantially on the axis of oscillation and having cooperating offset portions extending in the direction of the'l arcs, and el-astic deformable material between said surfaces, deformable to accommodate relative movements of the surfaces, but Y which deformation is resisted in a direction transversely of the arcs by said cooperating oifset portions. n

8. In combination with a support and a body to be supported having inherent lateral Vibration and oscillating about a longitudinally extending axis, of a connection between the support and body including mating surfices shaped tofoi'm'arcs of circles whose centers are located substantially on the axis of oscillation and having depressions extending in the direction ofitlie arcs, and elastic deformable material interposed between said` j surfaces and projecting ,into said depressions,

whereby its 'deformationis unrestrained to accommodate relative movements of said surfaces, upon vibrations inheientlin the body but is resisted upon movements in other di- `rections.

at the center of the engine downwardly from above the front of the engine and intersecting the axis ofthe engine crankshaft adjacent the mount ata single point on thel frame the rear of the engine adjacent its axis of'oscillation,

, yand a connection between each side of the engine at the front thereofand the f frame, including deformable material interposed between mating surfaces of the engine and frame, that extend substantially at right angles to the axis of oscillation to permit relative lateral movement` ,of the parts connected, whereby the inherent engine vibrations may occurwithout being transmitted to the-frame.

10. A. three point suspension for engines having inherent lateral vibrations oscillating about an axis extending longitudinally atthe center of tlieengine downwardlyil from above -l near of vthepyengine, including in combination." y

with a supporting frame, means to yieldingly izo a the front `of the engine and intersecting the' f,

axis of the engine crankshaft adjacent the rear of the engine, including in combination with a supporting frame, means to yieldingly mount on the frame the rear ofthe engine advl' jacent its axis of oscillationfand. a connection between each side ofthe engine-at the iso with the engi-ne and frame -yfront thereof and the frame,

l v n r K including cooperating surfaces of arcuate .shape associated r forming an arc of a circle whose center' is on the axis of oscillation, and material interposed between the cooperating arcuate surfaces and adapted for deformation .to accommodate relative movement of the parts due tothe inherent engine vibrations.

11. In a motor vehicle, the combination .with an engine having inherent lateral vibration oscillating about a longitudinal axisof .means to' support the engine at opposite side l'thereof including a frame having arcuate supporting surfaces that form arcs of a com- .A

Amon circle, whose center is on the axis of oscillation, parts associated with the engine that are to be connected with said frame and having arcuate surfaces thru which the en- Y longitudinal axis,

gine is supported and which are similar to and cooperate with said arcuate supporting surfaces, and elastic deformable 'material interposel between the cooperating arcuate surfaces of the engine and frame,and which is deformable between said surfaces to accommodate the inherent engine vibrations..

12. Means for reslliently mounting in a frame an engine having ginherent lateral vi brat'ions that oscillate the engine about a longitudinal axis, including cooperatingr frame and engine vbrackets adapted to be secured one to the other and having their adjacent surfaces of arcuate shape, forming arcs of circles-whose centersv are on the axis of oscillation of the engine, elastic deformable'material vinterposed/between said arcuate surfaces, adapted for' deformation to permit relative movement of the surfaces upon lateral vibration of the engine about the axis of oscillation. .i

13. Means for resiliently mountingin a frame an engine having inherent lateral vi-I brations that oscillate the engine about a y f including cooperating frame and engine brackets adapted to be secured one to the other andfhavingA their ad' jacent surfaces of arcuate shapeyforming ar'csof circles whose centers lare on the axis of oscillation of the engine, elastic deformable materialv interposed between said arcuate surfaces, adapted for deformation to l' permit relative movementof the surfaces upon lateral vibration of the engine about the axis lof oscillation, a fastening element extending thru the brackets and the intermediate elasticdeformable material, a sleeve of elastiomaterial surrounding saidl element andextending thru the opening in one of the brackets and bearing against underside of the bracket, and anelastic member carried under tension by the fastening element and bearing on the other bracket to yieldingly hold the parts `together'.

14. Means forresiliently mounting `in a frame, an engine having inherentlateralvirespectively, and

elastic deformable v Afifzfaaasaa bratio'n that tends to` swing the engine about an axis'extending longitudinally of the engine, Jincludin cooperating frame and enginel brackets t at are Securedone to the other and have their adiacentsurfaces corrugated in alongitudinal direction and arcuate in a transvsedirection, the respective arcs being parts of circles whose centers are on the axis of vibratory swinging movement of the engine, Land elasticdeformablelmaterial interv the engine, including in combination. with a supporting frame, means` to yieldingly mount on the frame, the rear of the engine adjacent the point of intersection of the axis of oscillation and the axis of the crankshaft, and a connection between each side of the engine adjacent the front thereof and the frame, including seats onthe engine and frame that extend substantially in the direction of oscillatory movement of the engine about the ysaid axis, and deformable materialinterposed between the seats to cushion inherent lateral vibrations of the engine. Y.

Intestimom7 whereof I aiiix mv signature.

ALBERT STANLEY HARBOUR.

MRI). 

